September Weather in North Mankato, United States

Last updated: June 24, 2025

In North Mankato, United States, the average temperature in September is a pleasant 18°C (65°F). Expect temperatures to range from a low of 2°C (36°F) to a high of 33°C (91°F). However, be prepared for some rainfall, as precipitation amounts can reach 142 mm (5.6 in) over about 10 days. With an average humidity level of 81%, the air can feel quite moist, adding to the region's unique climate experience.

September Temperature in North Mankato

In September in North Mankato, the average temperature is 18°C (65°F), with maximums reaching 33°C (91°F) and minimums dropping as low as 2°C (36°F). This makes North Mankato an ideal destination for travelers seeking a mix of comfortable days and cooler evenings.

September Weather in North Mankato: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in North Mankato, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In North Mankato, September typically has an average temperature of 18°C (65°F), with highs reaching up to 33°C (91°F) and lows dropping to around 2°C (36°F).

Data source: Temperature data for North Mankato generated using information from the Copernicus Climate Change Service.

September Precipitation in North Mankato

In North Mankato in September, the total precipitation amount is 142 mm (5.6 in) over the course of 10 days.

September Precipitation Trends in North Mankato

The chart displays monthly precipitation patterns in North Mankato, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In North Mankato, September typically receives around 142 mm (5.6 inches) of precipitation spread over approximately 10 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in North Mankato

In North Mankato in September, humidity is 81%. With an average temperature of 18°C (65°F), this humidity feels like a thick blanket wrapping around you, making every step feel heavier and the air thick and sultry—a challenging environment for traveling.

September Average Humidity in North Mankato

This chart illustrates the average monthly humidity levels in North Mankato, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in North Mankato is approximately 81%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in North Mankato

In North Mankato in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in North Mankato.

Maximum UV Index Levels in North Mankato for September

The chart shows the monthly maximum UV Index (UVI) for North Mankato in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in North Mankato typically reaches 8, which falls under the very high exposure category.

Data source: North Mankato September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How September Weather in North Mankato Compares to Other Months

Weather in North Mankato varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in North Mankato, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in North Mankato, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-8°C (17°F)	32 mm (1.3 inches)	87%	moderate
February Weather	-9°C (16°F)	35 mm (1.4 inches)	90%	moderate
March Weather	1°C (34°F)	67 mm (2.6 inches)	85%	moderate
April Weather	7°C (44°F)	88 mm (3.5 inches)	84%	very high
May Weather	15°C (60°F)	130 mm (5.1 inches)	78%	very high
June Weather	22°C (72°F)	106 mm (4.2 inches)	80%	very high
July Weather	24°C (75°F)	121 mm (4.8 inches)	81%	very high
August Weather	22°C (71°F)	128 mm (5.1 inches)	81%	very high
September Weather	18°C (65°F)	142 mm (5.6 inches)	81%	very high
October Weather	9°C (49°F)	91 mm (3.6 inches)	84%	moderate
November Weather	1°C (34°F)	33 mm (1.3 inches)	88%	moderate
December Weather	-4°C (25°F)	43 mm (1.7 inches)	84%	low